MDF painters will often rely on respirators while working with chemicals. These masks purify the air so we can breathe easier during job sites. They don't eliminate the risk of contamination. However, when used properly, they will reduce the risk of exposure to below hazardous levels. It's important to note that these masks do not supply any oxygen. When in use, the air must have an oxygen level of at least 19%. Any air quality that is considered life-threatening can't be fixed with an air respirator alone. If the chemicals you're coming into contact with don't have warning signs, such as odor or taste, be incredibly careful. If you feel like you cannot breathe, you're dizzy or light-headed, you're nauseous or think you can detect the chemicals, please seek fresh air immediately. Depending on the severity of the symptoms, contact medical help as needed.